ensure maintenance is carried out by a competent person (someone who has the necessary skills, knowledge and experience to carry out the work safely) 1  maintain plant and equipment regularly â use the manufacturerâs maintenance instructions as a guide, particularly if there are safety-critical features.
HDPE (High Density Polyethylene). 3/4 HDPE will cost about $45.00 for 100' ($0.45/ft), so depending on the amount required can be much cheaper than the previous options. HDPE is used by many municipalities as water supply lines, so it has been tried and tested in underground applications.
HDPE_physical-properties_v002 HDPE Physical Properties /10 Introduction High Density Polyethylene (HDPE) is a thermoplastic material which is supplied by the manufacturer in a âready to useâ pelletised form. The grades suitable for pipe manufacture are PE 63, PE 80 and PE100. The pipe manufacturer converts this material into pressure pipe.